如图1,抛物线
:
经过点
和点
,已知直线l的解析式为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/19/c998f3a7-4f7c-45e9-9ede-2c0c3310d341.png?resizew=339)
(1)求抛物线
的解析式;
(2)如图2.当
时,直线与抛物线交于M、N两点,点P是抛物线位于直线l上方的一点,当
面积最大时,求P点坐标,并求面积的最大值;
(3)如图3,将抛物线
在x轴上方的部分沿x轴折叠到x轴下方,将这部分图像与原抛物线剩余的部分组成的新图像记为
,直接写出直线l与图像
有四个交点时k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fe2c124d5bbbbe666ee145cd454b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fcf17d032f3e652e2b5cc50789bf3de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/19/c998f3a7-4f7c-45e9-9ede-2c0c3310d341.png?resizew=339)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
(2)如图2.当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e69866076dcff686a05e9e91e61e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
(3)如图3,将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
更新时间:2023-03-11 12:29:22
|
相似题推荐
解答题-问答题
|
较难
(0.4)
解题方法
【推荐1】如图,二次函数
的图象与
轴交于
,
与
轴交于点
.若点
,
同时从
点出发,都以每秒1个单位长度的速度分别沿
,
边运动,其中一点到达端点时,另一点也随之停止运动.
![](https://img.xkw.com/dksih/QBM/2021/5/15/2721397358977024/2726423985758208/STEM/3bd1cd7c-f21c-4829-9f7b-46551d3fb8c7.png)
(1)求该二次函数的解析式及点
的坐标;
(2)当点
运动到
点时,点
停止运动,这时,在
轴上是否存在点
,使得以
,
,
为顶点的三角形为等腰三角形?若存在,请直接写出
点坐标;若不存在,请说明理由.
(3)当
,
运动到
秒时,
沿
翻折,点
恰好落在抛物线上
点处,请判定此时四边形
的形状,并求出
点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241ce9bd28046ce9b90f43b391132884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42f05b013e4b7166cbc87c5a83d6a85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2021/5/15/2721397358977024/2726423985758208/STEM/3bd1cd7c-f21c-4829-9f7b-46551d3fb8c7.png)
(1)求该二次函数的解析式及点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e5fbbca784b2edc6af96ce3b21451df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】在平面直角坐标系中,已知抛物线
经过
,
两点.
是抛物线上一点,且在直线
的上方.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/25/2b63bc08-327c-49ae-b1ed-0c0630ae7dd9.png?resizew=177)
(1)求抛物线的表达式;
(2)若
面积是
面积的3倍,求点
的横坐标;
(3)如图,
交
于点
,判断
是否存在最大值.若存在,求出最大值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53be61cd85ec86aabd164cae0265246b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4fd4da08956db1f206c8ea026f4e52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6868a51ea0a78f2605d3d1cbe701351b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/25/2b63bc08-327c-49ae-b1ed-0c0630ae7dd9.png?resizew=177)
(1)求抛物线的表达式;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a57c0de2c34f18f61707baba00a048.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,已知抛物线
的图象与x轴交于
,
两点,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/6b5b887a-0a45-4f5a-96d0-5b6cdd9c2344.png?resizew=405)
(1)求抛物线的解析式.
(2)如图1,点P为第四象限内抛物线上的一个动点,连接
交直线
于点Q.设点P的横坐标为m,求出
的最大值及此时点P的坐标.
(3)如图2,点F是抛物线上的一个动点,是否存在一点F,使
?若存在,请直接写出点F的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33afa8924f1af256a77d53e2ec2ba539.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/158f5a581695399f6ffdf65110dec692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b49507199b1c1408c6fc71238c0848.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/6b5b887a-0a45-4f5a-96d0-5b6cdd9c2344.png?resizew=405)
(1)求抛物线的解析式.
(2)如图1,点P为第四象限内抛物线上的一个动点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7945f52511981402a8e648fb1b38796d.png)
(3)如图2,点F是抛物线上的一个动点,是否存在一点F,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83836656def29563f1c07572052087b2.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
真题
【推荐2】如图,抛物线y=ax2+bx+c的开口向下,与x轴交于点A(﹣3,0)和点B(1,0).与y轴交于点C,顶点为D.
![](https://img.xkw.com/dksih/QBM/2013/9/10/1573679886655488/1573679892889600/STEM/2ab93bf3089240de999475a919bd3ff7.png)
(1)求顶点D的坐标.(用含a的代数式表示);
(2)若△ACD的面积为3.
①求抛物线的解析式;
②将抛物线向右平移,使得平移后的抛物线与原抛物线交于点P,且∠PAB=∠DAC,求平移后抛物线的解析式.
![](https://img.xkw.com/dksih/QBM/2013/9/10/1573679886655488/1573679892889600/STEM/2ab93bf3089240de999475a919bd3ff7.png)
(1)求顶点D的坐标.(用含a的代数式表示);
(2)若△ACD的面积为3.
①求抛物线的解析式;
②将抛物线向右平移,使得平移后的抛物线与原抛物线交于点P,且∠PAB=∠DAC,求平移后抛物线的解析式.
您最近一年使用:0次
解答题-计算题
|
较难
(0.4)
【推荐1】如图,已知抛物线经过原点
和
轴上另一点
,它的对称轴
与
轴交于点
,直线
经过抛物线上一点
,且与
轴、直线
分别交于点
、
,点
是
的中点.
的值;
(2)求该抛物线对应的函数关系式;
(3)若
是该抛物线上的一个动点,是否存在这样的点
,使得
?若存在,试求出所有符合条件的点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18ee0a9e35aea04b71785b249cc4b24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e985f1340c05b4e9cad85db1d54d66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)求该抛物线对应的函数关系式;
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1330569b47697ad0897ff9fcabc590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
真题
【推荐2】如图,平面直角坐标系中有一矩形ABCD(O为原点),点A、C分别在x轴、y轴上,且C点坐标为(0,6);将BCD沿BD折叠(D点在OC边上),使C点落在OA边的E点上,并将BAE沿BE折叠,恰好使点A落在BD的点F上.
![](https://img.xkw.com/dksih/QBM/2010/12/14/1574125204946944/1574125268320256/STEM/f2451b576d28432888c63896b5a459b5.png)
(1)直接写出∠ABE、∠CBD的度数,并求折痕BD所在直线的函数解析式;
(2)过F点作FG⊥x轴,垂足为G,FG的中点为H,若抛物线
经过B、H、D三点,求抛物线的函数解析式;
(3)若点P是矩形内部的点,且点P在(2)中的抛物线上运动(不含B、D点),过点P作PN⊥BC分别交BC和BD于点N、M,设h=PM-MN,试求出h与P点横坐标x的函数解析式,并画出该函数的简图,分别写出使PM<NM、PM=MN、PM>MN成立的x的取值范围.
![](https://img.xkw.com/dksih/QBM/2010/12/14/1574125204946944/1574125268320256/STEM/f2451b576d28432888c63896b5a459b5.png)
(1)直接写出∠ABE、∠CBD的度数,并求折痕BD所在直线的函数解析式;
(2)过F点作FG⊥x轴,垂足为G,FG的中点为H,若抛物线
![](https://img.xkw.com/dksih/QBM/2010/12/14/1574125204946944/1574125268320256/STEM/8fc5fbefce6e419bb49e1c432e05e389.png)
(3)若点P是矩形内部的点,且点P在(2)中的抛物线上运动(不含B、D点),过点P作PN⊥BC分别交BC和BD于点N、M,设h=PM-MN,试求出h与P点横坐标x的函数解析式,并画出该函数的简图,分别写出使PM<NM、PM=MN、PM>MN成立的x的取值范围.
您最近一年使用:0次